Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.

Notices

Welcome to LinuxQuestions.org, a friendly and active Linux Community.

You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!

Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.

If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.

Having a problem logging in? Please visit this page to clear all LQ-related cookies.

Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

Half the answer first: There is a program that's called scponly, which disables normal ssh logins and only permits the use of scp (hence scponly). But this only solves half your problem, I would not know how to combine scponly with the '1 specific command' only request.

If you are interested in scponly, feed your favorite search engine. Here are 2 links to get you going:

Maybe you can use a different approach: You could consider creating a specific account that has a script as a 'shell' instead of the standard bash/ksh/... shell. When one logs into that account the script, which could be anything from a single command to a menu with multiple things, is executed and the user is logged out again afterwards.